[FFmpeg-cvslog] avfilter/af_dynaudnorm: use better limits for maximal amplification

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sat Jan 11 14:08:52 2020 +0100| [b650046860d3390de9fd3a9ffef28e36a9a6138e] | committer: Paul B Mahol

avfilter/af_dynaudnorm: use better limits for maximal amplification

Fixes regression in smoothness of amplification.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b650046860d3390de9fd3a9ffef28e36a9a6138e
---

 libavfilter/af_dynaudnorm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavfilter/af_dynaudnorm.c b/libavfilter/af_dynaudnorm.c
index db91d28b36..365453d60d 100644
--- a/libavfilter/af_dynaudnorm.c
+++ b/libavfilter/af_dynaudnorm.c
@@ -521,10 +521,11 @@ static void update_gain_history(DynamicAudioNormalizerContext *s, int channel,
     }
 
     while (cqueue_size(s->gain_history_minimum[channel]) >= s->filter_size) {
-        double smoothed;
+        double smoothed, limit;
 
         smoothed = gaussian_filter(s, s->gain_history_minimum[channel], s->threshold_history[channel]);
-        smoothed = FFMIN(smoothed, cqueue_peek(s->gain_history_minimum[channel], s->filter_size / 2));
+        limit    = cqueue_peek(s->gain_history_original[channel], 0);
+        smoothed = FFMIN(smoothed, limit);
 
         cqueue_enqueue(s->gain_history_smoothed[channel], smoothed);